Tanacat, I didn't feel guilty digging the clad, but fact was, I didn't spend much time digging for clad, because I was sooo excited to have the opportunity to use my hobby for something meaningful for someone else. (I only stopped for clad if it was an 89 or 90 (Quarter) or a dime within an inch of surface.) It was the first 'real' opportunity to put my efforts to good use. And it paid off, in my mind. Those park employee guys, who, btw, did not stick around over top of me, will welcome my presence when I go back there. And after the 4th of July, I'm planning to be all over that field, after the huge crowds gather for the fireworks.